@font-face {
    font-family: "IBM Plex Sans JP";
    src: url("IBMPlexSansJP-Regular.ttf") format("truetype");
}

html {
    scroll-behavior: smooth;
}

body {
    width: 100%;
    max-width: 700px;
    margin: 0 auto;
    font-family: "IBM Plex Sans JP", sans-serif;
}

.contents {
    margin: 20px;
}

.title {
    color: black;
    font-size: 30px;
    width: 100%;
    max-width: 500px;
    margin: 0 auto;
    padding-top: 20px;
}

.toTheTop a {
    background-color: white;
    color: black;
    text-decoration: none;
    position: fixed;
    bottom: 20px;
    right: 20px;
}